A GitHub repository recently published what it describes as a runtime system prompt for Claude Fable 5.1. The file contains more than 275,000 characters of instructions related to tool use, web search, memory, copyright, safety policies, and interface behaviour. That naturally produced a dramatic headline: Claude had been hacked and its secret prompt had leaked. The evidence does not support such a broad conclusion. There is no public indication that Anthropic’s servers were compromised, t...